From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Photograph of a threaded and splined shaft assembly, with a handwritten note indicating the direction of rotation.
| Identifier | ExFiles\Box 178\4\ img086 | |
| Date | 2nd May 1932 guessed | |
| C DIRECTION OF ROTATION | ||